Elevator.



No. 763,946. BATENTED JUNE zal, 1904.

SENATOR* PBIGJQATIQN FILED OQT. 22; 1903. No mamarL` 2 SHEETS-SHEET 1.

Wyassasf QQJWYOK n wat QWWVW UNITED STATES l Patented June 28, 1904.

` PATENT OFFICE.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 763,946, dated June 28, 1904. Application filed October 29, 1903. Serial No. 179,053. (No model.)

To a/ZZ whom, t tay concern:

Be it known that I, GAETANO Visco, a citizen of the United States, residing at Brinton, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Elevators, of which the following is a specification.

My invention relates to elevators; and its object is to provide a novel form of apparatus for operating such devices with great safety.

My invention consists of certain novel forms of details and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings like characters refer to like parts throughout.

Figure l shows a front elevation of an elevator equipped with my device. Fig. 2 shows a side elevation of the same. Fig. 3 shows a bottom plan view of the same. Fig. 4 shows a modication of my device.

The numeral l indicates the elevator-shaft, which is provided with racks 2, located in pairs, that face inwardly. These racks may, if desired, be shrouded to add strength to the teeth and prevent lateral movement of a gear meshing therewith.

Upon the Linder side of the car 3 is held a frame 3, carrying a motor of any desired type, as shown at 4. Upon the armature-shaft 5 of this motor is formed a pair of oppositely-directed worm-screws 6. Shafts 7, held inthe frame 3', carry gears 8, meshing with the racks 2 before mentioned. Also the gears upon one shaft mesh with those upon the other, as shown. Vorm -gears 9, meshing with the worm-screws 6, are also held upon said shafts.

It will be plain that rotation of the motor-armature will cause the worm-screws to act on the worm-wheels, and thus move the elevator up or down the shaft. It is also obvious that should the motor fail to operate the elevator Car will at once come to a stop and be securely held if the worm and worm-wheels are proportioned so that the worm can operate the worm-wheels; but the inverse action cannot take place.

- I have thus provided a simple and eiiicient device of the character designated and for the purposes set forth.

It is obvious that many changes may be made in the form of my device without affecting the principles thereof. For instance, the racks may not be placed exactly in the corners of the wall, but may be fixed to the wall and the position .of the gears changed to accommodate them. The arrangement of gears meshing with the racks may be doubled by having a second Worm-shaft geared to the rst.

The entire device may be used on an inclined trackby making the underframe stand at an angle to the car.

Having thus described my device, what I claim as new, and desire to secure by Letters Patent, is-

In an elevator, an elevator-shaft, four racksv held in said shaft and provided with shrouded teeth, a-car, a motor having an armature-shaft therein, a pair of oppositely-directed wormscrews upon said armature-shaft, a pair of shafts at right angles to said armature-shaft, a worm-gear on each of the last-mentioned shafts meshing with said worms and rotating in opposite directions, and a pair of intermeshing gears held on each end of said pair of shafts and each meshing with one of said racks.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

GAETANO VISCO. Witnesses:

JOHN GROETZINGER, M. HUNTER. 

